This presentation details file system data structures such as inodes, their metadata, directory organization, path traversal, and operations including open, read, and write. It also covers caching mechanisms like buffer cache and the role of memory mapping in optimizing file access.
This document introduces a simple file system called vsfs as a case study to explain basic on-disk data structures like inodes, bitmaps, directories, and policies for allocation and access. It covers file read/write operations, caching, and trade-offs in file system implementation details.
This document explains the crash-consistency problem in file systems and how journaling (write-ahead logging) effectively addresses it by recording transactions in a journal before applying changes to on-disk data. It covers fsck, journaling modes (data vs metadata journaling), recovery, and challenges like block reuse and protocols ensuring atomic updates despite crashes.
This lecture covers file system data structures like inodes, bitmaps, superblock, and blocks. It discusses metadata management, File Allocation Table (FAT), directory structures, free space management, and system calls for file operations, highlighting modern and traditional file system designs.
This lecture explains IO devices and their communication with CPU/memory via buses. It highlights device registers, programmed IO, polling vs interrupts, DMA, device drivers, and how operating systems interact with hardware for IO operation.